I'm relatively new to the NSM mindset and have been following a looser version of it for about 6 months now. I've also read most of this thread. I've been doing 2-3 sub-T workouts per week (mostly 15K, HM, and 30K pace intervals) and the rest very easy. It's been going well so far and I'm seeing big improvements in consistency and load.
But the only problem is when it comes to racing all out 5Ks. The first time I raced a full 5K I did mini TTs beforehand, running up to 2K at my goal 5K race pace. I also did around 4 fast strides after easy runs about 3 times a week. Then after I raced the whole 5K I felt good after and was able to jump back into normal training immediately afterwards.
When building up to my second 5K race, I stopped doing the strides and the mini TTs to just focus on the sub-T workouts. During the second race I felt like 5K pace was a sprint because I hadn't run close to that pace in over 2 months. Then after I did this race, I felt absolutely terrible afterwards. My quad was extremely sore and I had to take 5 days off of running. Even walking felt uncomfortable. Luckily after the time off I felt all better and was able to build back up to full training in about 2 weeks.
In the build to my third 5K race, I replaced one of the normal sub-T workouts with 90 second or 400m reps at 5K-10K pace with 60 seconds standing rest in between. During this race I felt way better. A big PR from the previous race and 5K pace didn't feel like a sprint anymore since I had run close to that pace in training before. I also didn't feel injured after the race and was able to train normally afterwards.
Is anyone else having this same problem where not running close to race pace or not doing speedwork faster than race pace makes them feel very bad during races or feel injured afterwards? In addition to the experience I just mentioned, this has also happened to me about 14 months ago when I raced a 5K well before starting NSM. At this time, I was only running at paces a lot slower than 5K pace. Right after the race, I started getting adductor pain and had to take a week off of running as a result.
At least for me, I just don't see how following the strict version of NSM (3min, 6min, and 10min reps at 15K, HM, and 30K pace respectively) would allow me to feel good during faster races because the paces close to race pace are never encountered during training. Thus, I think including a small amount of faster work without sacrificing the accumulation of load is necessary for my case as I don't want to get sore/injured after every race effort. Is anyone doing this currently?